Compilare: user.cpp: In member function ‘size_t celula_hash::operator()(const nume_celula&) const’: user.cpp:40:39: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] return (hash<int>()(get<0>(n))<<4 + 23) ^ (hash<int>()(get<1>(n))>>1 + 13); } }; ^ user.cpp:40:74: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] return (hash<int>()(get<0>(n))<<4 + 23) ^ (hash<int>()(get<1>(n))>>1 + 13); } }; ^